build: use new gitlab syntax for triggering other pipeline

.gitlab-ci.yml

@@ -46,14 +46,17 @@ mypy:
   stage: tests
   script: tox -e mypy
 
-trigger-other-pipelines:
+trigger-cubicweb-pipeline:
+  stage: after-tests
   except:
     variables:
-      - $TRIGGERED_FROM_OTHER_PROJECT
-  stage: after-tests
-  script:
-  # regarding the " everywhere when there is a '%': yaml is extremly weird when % are involved
-  - curl -X POST -F "variables[TRIGGERED_FROM_OTHER_PROJECT]=true" -F token=$CUBICWEB_PIPELINE_TRIGGER_TOKEN -F ref=branch/default https://forge.extranet.logilab.fr/api/v4/projects/385/trigger/pipeline -w "\nhttp code:"\ "%{http_code}\n" -f
+      - $TRIGGERED_FROM_OTHER_PROJECT && $TRIGGERED_FROM_OTHER_PROJECT != "yams"
+  variables:
+    TRIGGERED_FROM_OTHER_PROJECT: "yams"
+  trigger:
+    project: cubicweb/cubicweb
+    branch: branch/default
+    strategy: depend
 
 trigger-readthedocs:
   only: